While Kristen Stewart has made a career of balancing big-budget films and smaller indies, she just couldn't make time for "K-11." While she had an in for a bigger role in the LGBT-themed prison drama (her mom is the director!), she wasn't able to take time out of her busy filming schedule for a lead role.

"She kept working and she kept working and she kept working," mom Jules Stewart told Us Weekly about downsizing her daughter’s role in the movie. "And she got really big and we were still really small and I was like, 'Go! Go do 'Snow White,' please, go make those big films honey, that's wonderful!'"

Kristen's original role will now be played by Portia Doubleday ("Youth in Revolt"), but Stewart-philes should still tune in. She'll be in the flick, albeit briefly, playing a secretary. "Kristen has a dark side," her mom said about her daughter’s ability to play grittier roles, like the one Portia was cast in. "Kristen has the edge—thank god, right?"

The film is out in limited release on March 15. News first broke of KStew's smaller role in “K-11” last year, when her mom blogged about it. She said, "Kristen has always been supportive of 'K-11,' but you'll have to look very hard to find her. It's a micro-cameo. We'd already finished shooting the movie, but Kristen still wanted to be a part of it in some way."